Wire binding machine



Sept. 25,1934. I C..RA$CH 1,974,893

WIRE BINDING MACHINE Filed Sept. so. 1933 40 manner.

Patented Sept. 25, 1934 WIRE BINDING MACHINE Christian Rasch, namlosa, ,Sweden 3 Application September-30,1933, Serial No. 691,668 In Denmark October 1, 1932 1 claim. (01.140 93) The present invention relates to certain improvements in wirebinding machines provided with alever,-handle, hand crank, hand wheelor the like by the means of which a wire or the 5 like after being placed around a bale, box, packing case or any other similar obstacle is drawn tight, the one end of the wire being clamped'in suitable manner to the binding machine, while U H the other end of the wire is attached to a stretching drum or any other suitable member with which the lever is connected, and when this lever is actuated upon the stretching member draws the wire tightly around the object in question, whereupon the wire ends are interconnected, for

instance by being twisted together, and the excess material is finally cut away.

It is necessary when employing wire binding devices of this kind, that the wire is stretched as tightly as possible in order to secure the most effective binding. In the ordinary binding ma- 'iso' wire should be employed to its utmost but without reaching or exceeding the breaking point of the wire, the manner of binding with the hitherto known constructions of wire binding machines is most unsatisfactory as long as it cannot be controlled.

By means of the present invention there is attained a most economical utilization of the wire material employed, and at the same time this result is obtained in a most simple and easy The stretching of the wire by means of this improved device may be regulated, no matter what size of wire is used, and the binding material is fully utilized without any risk of faulty or irregular bindings. The characteristic -feature according to the invention is the insertion between the operating lever and the handle thereof of a yielding resistance, which when overloaded effectuates a looking or a releasing of stretching members.

tion partly in section of a modified construction of the device according to the invention.

As' shown in Fig. 1 a base 2 isplaced on a case 1, and around this case is arranged a wire 3, the one end of whichis clamped to the device by means of a earn 4 provided with an operating hand 5, while the otherend of the'wire is laid around a stretching'drurn Sand inserted within one of the grooves 7" formed there. A ratchet wheel 8 is rigidly'attached to this drum and is operated to rotation by means of a pawl 9 pivoted to a lever 10- arranged for rotation on a' shaft 23 in common with the drum 6. A pawl 11 pivoted to the base 2 is likewise in engagement with the ratchet 8.

An angle lever 13 carrying a handle 14 is pivotally mounted on a pin 12 to the upper end of the lever 10. The angle lever 13 rests on a spindle 15 provided with a nut 16, between which nut and an arm 17 projecting from the lever 10 a spring 18 is interposed. The spindle 15 projects slidably through a hole in the arm 17 and at its low-er end terminates in a tooth 19, which upon the compression of the spring 18 and the subsequent downward movement of the spindle 15 engages a toothed plate 20 attached to the base 2. To guide the spindle 15 in its movement through the arm 17 the spindle is provided with a longitudinal groove 21 that is engaged by a pin 22 in the arm 17.

The wire 3 around the case 1 is stretched by swinging the lever 10 on its shaft 23 thereby causing the pawl 9 to engage the teeth of the ratchet 8 to the effect of rotating the drum 6, and by this the wire is drawn tight, while the pawl 11 prevents the drum in reversing. As soon as a certain predetermined tension is reached the resistance offered by the wire to the movement of the lever 10 is so great that the spring 18 is compressed and the handle 14 and angle lever 13 rotate on the pin 12 in relation to the lever 10, and by this the spindle 15 is depressed into the position shown in Fig. 3, which shows the tooth 19 engaging the teeth of the toothed plate 20, thereby preventing the continued operation of the lever 10. The tension of the spring 18 and accordingly the force necessitated to depress the spindle 15 for locking purpose is regulated by means of the nut 16, so that the tension the wire 3 is subjected to may be adjusted as closely as permissable to breaking point.

A stop 24 on the rear end of the angle lever 13 prevents the handle from being pressed backwards by the spring 18. This stop abuts the lever 10. The handle 14 is preferably formed as illustrated in Fig. 2, as in a handle of this type the height abovethe horizontal portion of the angle pawl 4 is arranged upon a spindle 15, whichcarries an adjustable nut 16' and a spring 18'. Between the spring and an arm 17 projecting from the lever 10 the spindle 15' is slidable in a. hole in the arm 17' and in a second arm 28 projecting from the lever 10."; The spindle 15 has an eye 29 embracing one arm of theangle lever 13', which is pivoted on a pin 12' on thelever 10.

In the event of overloading, the angle lever 13 turns into the position indicated by dotted lines and the pawl 9 rises into the position likewise indicated by dotted lines, thereby releasing the ratchet 8. A draw rod 14'. leads to a handle, mechanical drawing means or the like. v The details of construction may deviate from those shown in the accompanying drawing, as likewise the invention may be employed in combination with any suitable device for stretching binding wire by means of an operating lever or the like, providing its handle is movable in a suitable manner in relation to the other parts and is connected thereto by means of a yielding intermediate member, so that the locking or releasing member for the stretching lever and controlled by it can become operative.

In the first form of construction an angle lever 13 may likewise be employed. A compression spring 18 or some similar member may be employed instead of the tension spring.

I claim: In a wire binding machine of the kind described, the combination of a stretching drum, a lever for operating same provided with a projecting extension, pivoted to the upper end of this lever the one arm of an angle lever, a handle attached to the upper end of the other lever arm, a spring actuated spindle having a threaded portion between the angle lever and the projecting extension of the operating lever, a nut on the threaded portion of said spindle by means of which the tension of the spring may be adjusted, a hole-in the projecting extension for the spindle, a rigid toothed plate that engages the spindle when the spring is overloaded, for the purpose of locking the drum against further rotation, and means for interconnecting the ends of the binding wire.

CHRISTIAN RASCH. 

